#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>



int main()
{
    pid_t id = fork();
    if(id < 0)
    {
        perror("fork");
        return 1;
    }   
    else if (id > 0)
    {
        printf("parent[%d] is sleeping...\n",getpid());
        sleep(30);
    }       
    else
    {
        // child进程
        printf("child[%d] is begin Z...\n",getpid());
        sleep(5);

        exit(EXIT_SUCCESS);
    }
    return 0;
}
